Scientists from the Russian National University of Science and Technology MISIS have developed a composite material combining high strength, thermal resistance, and durability. It may find application in aviation, energy and mechanical engineering. This was reported on the website of the Ministry of Science and Higher Education of the Russian Federation.

The researchers added aluminium oxide nanoparticles to an alloy of chromium, iron, cobalt, nickel and copper. These particles prevent the penetration of oxygen, which is one of the causes of material degradation when heated, thereby preventing the formation of microcracks.

The alloy with the addition of aluminium oxide nanoparticles became 29 percent stronger, 27 percent harder, and its wear resistance increased sixfold. The material also withstood prolonged heating up to 750 C – the oxidation rate was reduced by half, the material retained its ductility, and it did not fail under compression.

“The new composite may find application in the manufacture of components exposed to high loads and temperature fluctuations: turbine and compressor parts, engine valves, nozzle elements and protective coatings, as well as contact surfaces of electrical engineering equipment,” said engineer Umedzhon Narzulloev, who took part in the study.